Music-leaf turner.



No. 737,397. 'PATENTED AUG. 25, l903`..

' E. C. GRAEFENHAN.

MUSIC LEAP TURNER.

APPLIGATION FILED APR. 1s. 190s. V No MODEL. 2 SHEETS- SHEET 1,.

DHV] FIVE Vlnl'l VIVI l'l IIAIIIIIIIIIFII N nf ruff uw w .mu :.f ou wn IIIIIIIIIIIIIII-llllllllll No. 737,397. PATBNTED AUG. 25, 1903;4

E. 3.GRAEPENHAN.

MUSIC LEAF TURNER.

y APPLICATION FILED APB.. 18, 1903. N0 MODEL. 2 SHEETS-,SHEET 2.

R97, 55722655 0 @7W/222k@ 77 @gw/M flttouwn UNITED STATES Patented August 25, 1903. A

ERNEST C. GRAEFENHAN, OF LOUISVILLE, KENTUCKY.

MUSIC-LEAF TURNER.

SPECIFICATION forming part of Letters Patent No. 737,397, dated August 25, 1903.

Application filed April 18, 1903.

To all whom t may concern:

Be it known that 1, ERNEST C. GEAEEEN- HAN, a citizen of the United States, residing at Louisville, in the county of Jefferson and State of Kentucky, have invented new and useful Improvements in'Music-Leaf Turners, of which the following is a specification.

My invention relates to new and useful improvements in music-leaf turners; and its object is to provide a device of this character adapted to be operated by a suitably-arranged pedal and which is provided witharms each of which may be secured to a sheet of music, and these arms are adapted to be successively swung from right to left or from left to right, as desired.

A further object of the invention is to employ novel means for transmit-ting motion from the pedal to the arms.

With the above and other objects in view the invention consists in the novel construction and arrangement of parts hereinafter more fully described and claimed, and illustrated iu the accompanying drawings, in which- Figure 1 is a front elevation of my improved music-leaf turner in position upon a piano. Fig. 2 is a side elevation thereof. Fig. 3 is a vertical section therethrough. Fig. 4 is a rear elevation of the rail and the dog used in connection therewith. Fig. 5 is a section von line Fig. 3; and Fig. 6 is a detail view of one of the retaining-springs of the arms.

Referring to the figures by numerals of reference, 1 is a casing of any suitable form adapted to be secured to the front of a piano, organ, or similar instrument and is provided with a vertically-extending guide-block 2 at the center of the rear face thereof. Pivoted within the casing is a lever 3, having a knob 4 at its forward end which is slidably mounted in a slot 5 in the front of thecasing. L- shaped arms 6 extend in opposite directions from the rear end of lever 3, and to the rear ends of these arms are secured sliding pawls 7, which extend inwardly toward each other and are held normally projected by means of springs 8.

A sprocket-wheel 9 is located upon the pianoat a point below the keyboard thereof, and

j When the pedal upon the sprocket is mounted a chain 10,

serial No. 153,315. (No man which is adapted to extend upward between certain of the keys of the keyboard and through the rear end of casing 1 at opposite sides of the guide-block 2. This chain also extends to a sprocket 11, arranged upon the ,front of the piano at a point above the keyboard, and this sprocket is journaled within a casing 12, which is secured to the piano in any suitable manner. To the shaft 13 of the sprocket 11 is fastened a beveled gear 14. This gear normally meshes with a similar gear 15, arranged at the upper end of a shaft 16, having a suitable number of toothed segments 17 extending laterally therefrom and out of alinement with each other. Mounted upon a rod 18 within casing 12 are gears 19, equal in number to the segments 17 and in the same planes horizontal therewith. To each of these gears 19 is secured an L-shaped arm 20, which extends through a slot 21 in the casing and has a clip 22 at its outer and lower end adapted to engage a sheet of music. Spring-catches 23 are fastened to both sides of the casing 12 at points below the slots 21, and these springs have recesses 24 in their upper faces adapted to receive the arms 2O and hold them normally in position at the side of the casing. The forward ends of the springs 23 are inclined downwardly, as illustrated at 25.

A music-rack 26 of any suitable form is interposed between the casings 1 and 12, and upon the center of this rack is a rod 27, adapted to be placed between the sheets of music and prevent them from becoming displaced upon the rack.

A series of ratchet-teeth 28 is connected to chain 10 at opposite sides of the sprockets 9 and 11, and these teeth are so located that a tooth of one of the series is always in engagement with one of the pawls 7. Lever 3 is'held normally raised by a spring-cushion 29, arranged thereunder,and a rod 30 extends downward from this lever at a point in rear of its fulcrum to a pedal 31, fastened to the front of the piano adjacent to the bottom thereof. is depressed, lever 3 is drawn downward thereby, and the pawl 7 engaging a ratchet-tooth will carry said tooth downward, and thereby cause chain 10 to rotate the sprockets 9 and 11. The downward movement of the chain 10 will be sufficient to partly IOO rotate shafts 13 and 16, and this movement of said shafts will be sufficient to bring one of the toothed segments 17 into mesh with its gear 19 and rotate the same, so as to swing the arm 21 connected thereto ont of engagement with its retaining-catch 23 and into engagement with the similar catch at the opposite side of the casing. This movement of the arm 21 will, as is obvious, canse the sheet connected thereto to fold over the retainingrod 27. When it is desired to turn the next leaf, it is merely necessary to again depress pedal 3l, and this will cause the pawl 7 to pull downward upon the next tooth of the ratchet engaged thereby. Shaft 16 will thus be further rotated, and the second toothed segment will rotate its gearing 19. This operation can be continued until all of the arms 21 have been swung from one side of the casing 12 to the other., The operation can then be reversed by shifting vknob 4t laterally, so as to swing the other pawl, 7, of lever 3 into engagement with the other ratchet of lever 28. It will be understood that this second ratchet is moved upward into operative position While the first-mentioned ratchet is being drawn downward by its pawl.

In the foregoing description I have shown the preferred form of my invention; but Ido not limit myself thereto, as I am aware that modifications may be made therein without departing from the spirit or sacrificing the advantages thereof, and I therefore reserve the right to make such changes as fairly fall within the scope of my invention.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-

l. In a music-leaf turner the combination with a rotary gear and a leaf-engaging arm extending therefrom; of a toothed segment adapted to engage and rotate the gear, a sprocket, means for transmitting rotary morenee? pawls connected thereto'and operated thereby, and means for shifting said pawls alternately into engagement with the ratchets.

2. In a music-turner, the combination with a leaf-engaging arm, a chain and means operated by the chain for swinging the arm; of ratchets connected to the chain at opposite sides thereof, a pivoted lever, pawls thereon adapted to alternately engage the ratchets, and a pedal connected to the lever for operating the pawls.

3. In a music-leaf turner, the combination with a casing having a lever fulcrumed therein, a pedal connected to and adapted to operate the lever and pawls mounted upon the lever; of sprockets, a chain upon the sprockets, ratchets thereon adapted to be alternately engaged by the pawls, a shaft revoluble with the sprockets, toothed segments secured to the shaft, gears adapted to be engaged and rotated by the segments, and leaf-engaging arms extending from the gears.

4. In a music-leaf turner, the combination with leaf-engaging arms, a chain and means for transmitting motion from the chain to the arms, of a casing, a guide-block therein inclosed by the chain, ratchets secured to the chain at opposite sides of the guide-block, a

spring-pressed lever fulcrumed within the casing, an operating-knob extending therefrom, inwardly-extending pawls connected to the lever and adapted to alternately engage the ratchets, and a pedal connected to and adapted to operate the lever.

In testimony whereof I affix my signature in presence of two Witnesses.

ERNEST C. GRAEFENHAN. Witnesses:

ARTHUR PEsER, ADOLPH FRANZMANN. 

